package dao;

import java.util.List;

import org.hibernate.LockOptions;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.transaction.annotation.Transactional;

import bean.User;

/**
 * A data access object (DAO) providing persistence and search support for User
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see bean.User
 * @author MyEclipse Persistence Tools
 */
@Transactional
public class UserDAO {
    protected static final Logger log = LoggerFactory.getLogger(UserDAO.class);
    // property constants
    public static final String OPEN_ID = "openId";
    public static final String USER_NAME = "userName";
    public static final String PHONE = "phone";
    public static final String AVATAR = "avatar";
    public static final String TAG = "tag";
    public static final String SUPPORT = "support";

    protected SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    protected Session getCurrentSession() {
        return sessionFactory.getCurrentSession();
    }

    protected void initDao() {
        // do nothing
    }

    public void save(User transientInstance) {
        log.debug("saving User instance");
        try {
            getCurrentSession().save(transientInstance);
            log.debug("save successful");
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }

    public void delete(User persistentInstance) {
        log.debug("deleting User instance");
        try {
            getCurrentSession().delete(persistentInstance);
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }

    public User findById(java.lang.Integer id) {
        log.debug("getting User instance with id: " + id);
        try {
            User instance = (User) getCurrentSession().get("bean.User", id);
            return instance;
        } catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }

    public List findByExample(User instance) {
        log.debug("finding User instance by example");
        try {
            List results = getCurrentSession().createCriteria("bean.User")
                    .add(Example.create(instance)).list();
            log.debug("find by example successful, result size: "
                    + results.size());
            return results;
        } catch (RuntimeException re) {
            log.error("find by example failed", re);
            throw re;
        }
    }

    public List findByProperty(String propertyName, Object value) {
        log.debug("finding User instance with property: " + propertyName
                + ", value: " + value);
        try {
            String queryString = "from User as model where model."
                    + propertyName + "= ? ";
            Query queryObject = getCurrentSession().createQuery(queryString);
            queryObject.setParameter(0, value.toString());
            return queryObject.list();
        } catch (RuntimeException re) {
            log.error("find by property name failed", re);
            throw re;
        }
    }

    public List findByOpenId(Object openId) {
        return findByProperty(OPEN_ID, openId);
    }

    public List findByUserName(Object userName) {
        return findByProperty(USER_NAME, userName);
    }

    public List findByPhone(Object phone) {
        return findByProperty(PHONE, phone);
    }

    public List findByAvatar(Object avatar) {
        return findByProperty(AVATAR, avatar);
    }

    public List findByTag(Object tag) {
        return findByProperty(TAG, tag);
    }

    public List findBySupport(Object support) {
        return findByProperty(SUPPORT, support);
    }

    public List findAll() {
        log.debug("finding all User instances");
        try {
            String queryString = "from User";
            Query queryObject = getCurrentSession().createQuery(queryString);
            return queryObject.list();
        } catch (RuntimeException re) {
            log.error("find all failed", re);
            throw re;
        }
    }

    public User merge(User detachedInstance) {
        log.debug("merging User instance");
        try {
            User result = (User) getCurrentSession().merge(detachedInstance);
            log.debug("merge successful");
            return result;
        } catch (RuntimeException re) {
            log.error("merge failed", re);
            throw re;
        }
    }

    public void attachDirty(User instance) {
        log.debug("attaching dirty User instance");
        try {
            getCurrentSession().saveOrUpdate(instance);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }

    public void attachClean(User instance) {
        log.debug("attaching clean User instance");
        try {
            getCurrentSession().buildLockRequest(LockOptions.NONE).lock(
                    instance);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }

    public static UserDAO getFromApplicationContext(ApplicationContext ctx) {
        return (UserDAO) ctx.getBean("UserDAO");
    }
}